CN100489319C

CN100489319C - Air-distribution device based on the coanda effect with means for imparting a circulatory motion on the flow of air not properly oriented

Info

Publication number: CN100489319C
Application number: CNB200410101171XA
Authority: CN
Inventors: 弗朗切斯科·布泰拉; 马可·比亚肖托; 斯特凡诺·阿拉科夸
Original assignee: Centro Ricerche Fiat SCpA
Current assignee: Centro Ricerche Fiat SCpA
Priority date: 2003-12-16
Filing date: 2004-12-16
Publication date: 2009-05-20
Anticipated expiration: 2024-12-16
Also published as: ES2277189T3; US20050130579A1; CN1629501A; EP1544006B1; DE602004003776D1; ITTO20031009A1; DE602004003776T2; US7000639B2; JP2005178759A; ATE348720T1; JP4302047B2; EP1544006A1

Abstract

Described herein is a Coanda-effect air distributor for distributing a flow (F) between a number of ducts set downstream (8, 9, 10). Provided in the area that separates the initial ends of two ducts set downstream (8, 9, 10) is the inlet of a recirculation duct that creates an air circulation that masks the entrance of a duct set downstream when the flow (F) is deviated into the other duct.

Description

Have the gas distributor that makes the device that flows to wrong circulation of air flow motion based on Coanda effect

Technical field

The invention relates to the gas distributor based on Coanda effect, comprising: be located at the pipeline of upstream, it is branched off into and a plurality ofly is located at the pipeline in downstream and utilizes Coanda effect to make air flow deflector, and this air-flow passes above-mentioned pipeline and enters one or another pipeline.

Background technique

Coanda effect refers to that tending to " attaching " from the air-flow that pipeline comes out closes on the phenomenon of pipeline at it.In the previously presented device of current applicant, utilize the above-mentioned arrangement for deflecting of Coanda effect to comprise first moving element that is placed on the tube wall, it is positioned at the upstream of approaching certain downstream line ingress, and can move between the primary importance and the second place.On primary importance, it does not hinder air communication to cross upstream line, and on the second place, it stretches in the air-flow.Like this, this moving element is when above-mentioned primary importance, air-flow enters first downstream line, and owing to Coanda effect keeps being attached on this pipeline, and when moving element during in the second place, the air-flow that passes upstream line trends towards being attached on the wall of second downstream line relative with above-mentioned first wall, thereby makes air-flow enter above-mentioned second downstream line.

Summary of the invention

The purpose of this invention is to provide the air distributor based on Coanda effect as noted above, it compares more efficient with the design that has been suggested at present.

For achieving the above object, theme of the present invention is the air distributor based on Coanda effect of type as mentioned above, it is characterized in that, in the zone that the starting point that makes two downstream line separates, an inlet of recirculation line again is provided, enter two downstream line one of them, its shape can produce circulating air flow, enter the inlet of two one of them pipelines of downstream line, when another downstream line is gone in the air-flow bias current, cover the inlet of described pipeline.

Preferably, such scheme is to utilize the device of Coanda effect deflection air-flow to combine, comprise two moving elements, they are placed on the two relative tube walls of upstream line, and each can move between first and second positions, wherein primary importance does not hinder air-flow, and this moving element extend in the air-flow when the second place.Above-mentioned moving element should be synchronized with each other moves, and like this, when the primary importance of first moving element at it, second element is in its second place, and be opposite, and when the second place of first moving element at it, second element is in its primary importance.

According to further preferable feature, one of them moving element can followingly design, when it in its second place, when stretching in the corresponding pipeline, it disturbs the incorrect air-flow that flows to that may occur, said flow is produced make shuttling movement, thereby when air-flow enters a pipeline, another of downstream line covered.

Preferably use according to air distributor of the present invention and to comprise the air distribution system that is installed in the motor vehicle instrument plate.Although clearly be widely used according to Coanda effect air distributor of the present invention.

Description of drawings

Describe the application of the present invention on the motor vehicle instrument plate below in detail.

Complete hard-core example is provided in the accompanying drawing.

Fig. 1 is the schematic representation of description according to the principle of air distribution system of the present invention institute foundation:

Fig. 2 is according to the part perspective view that is used for the air distribution system of motor vehicle instrument plate of the present invention;

Fig. 3 is the enlarged view of a details among Fig. 2;

Fig. 4,5,6th, the amplification view of details among Fig. 3 has showed the situation of system according to the present invention under the different operating condition respectively;

Fig. 7 is an enlarged detail view among Fig. 4-6;

Fig. 8 is the schematic representation of the actuator of part shown in Figure 7; And

Fig. 9 is the version of Fig. 7.

Embodiment

In Fig. 1, drawing reference numeral 1 has been represented the whole instrument panel of motor vehicle in a schematic way, is air distribution system 2 in the instrument panel the inside.System 2 comprises a main pipe 3, and it is used for receiving the air-flow that air-conditioning system is come, and air-conditioning system comprises main fan 4 and heater/evaporator 5.Main pipe 3 extends arm or transverse tube 6, goes out along four of the parallel distribution of instrument panel auxilliary pipes 7 from arm top set, and is a pair of at driver side, a pair of in passenger side.Each all comprises a pipeline and the pipeline than the vehicle window of close motor vehicle near the instrument panel core to auxilliary pipe.Each auxilliary pipe 7 is branched off into three terminal tract, 8,9,10 (see figure 2)s, and each terminal tract all ends at the air outflow port in the passenger compartment of motor vehicle.Specifically, pipeline 8 transmits air to the pipeline opening 11 that is positioned at the windscreen bottom, thereby steering flow arrives the inner face of windscreen; The terminal of pipeline 9 is one or more outlets 12 that are positioned at the front of instrument panel, thereby in air being directed between the passenger of motor vehicle; The terminal of pipeline 10 is one or more outlets 13, is used for air-flow is directed to floor between the passenger.

Become in the zone of

terminal tract

8,9,10 in each auxilliary 7 branch of managing, settled to be used for air-flow is carried out assigned unit between terminal tract, details will be told about below.

Formed important being characterised in that of Another Application theme, each auxilliary pipe 7 all has extra and parts at least one characteristic of regulating air-flow independently.Detailed says, in the instantiation of being lifted, assists having of pipe 7 associated with each: the flow rate that parts 14 are regulated air, and the temperature that parts 15 are regulated air.Wherein, parts 14 comprise the fan that has corresponding electronic control motor, and parts 15 comprise a segment pipe, and the inside embeds a resistor.

Therefore, distribution system in the example can be controlled respectively from the speed and/or the temperature that export 11,12,13 air-flows that come out at each auxilliary pipe 7, just, in this example, can control driver zone, passenger area respectively, and for each described zone, the central region of difference operating board and the zone of contiguous window.

Fig. 4-6 illustrates air is assigned to the mode that the process of the

terminal tract

8,9,10 that branches out from auxilliary pipe is controlled from each auxilliary pipe 7.

For above-mentioned figure, first terminal tract 8 has the first crooked tube wall 8a in the extension of auxilliary pipe 7 corresponding pipeline 7a.With the corresponding position of described tube wall, have a moving element 16 to link to each other, moving element 16 axle 17 swings on the tube wall 7a, and can between as shown in Figure 4 the primary importance and the second place as shown in Figure 5, moving with pipeline.In primary importance shown in Figure 4, to from the auxilliary pipe 7 air-flow F that come interference effect being arranged, air-flow does not keep ' attaching ' on

tube wall

7a and 8a to moving element 16 always like this, thereby enters first terminal tract 8.In the second place shown in Figure 5, moving element extend among the air-flow F, thereby because Coanda effect, described air-flow is attached on the crooked pipeline 8b with wall 8a ingress relative and that be positioned at

terminal tract

9,10.

For obtain more efficient distribution of air flow between the inlet 8c of terminal tract 8 and

terminal tract

9,10, the present invention also provides another moving element 18.This element 18 can and can stretch between the second place (as shown in Figure 4) of air-flow F and move in the primary importance of disturbing flow F (as shown in Figure 5) not.Two moving

element

16,18 necessary synchronization control, thereby when the primary importance of moving element 16 at it, moving element 18 is in its second place (Fig. 4), otherwise, when the second place of moving element 16 at it, moving element 18 is in its primary importance (Fig. 5).In example, because moving element 16 and moving element 18 all are the parts of single member 19, and member 19 is swung around axle 17 on the structure of pipeline 7, and therefore above-mentioned synchronization control is very easy to obtain.Can see that in Fig. 7 member 19 comprises the parts 16 of blade type and same 16 rigidly connected parts of U-shaped shape, and the bent member of the formation moving element 18 on right angle orientation.

Under condition shown in Figure 4,, moving element 18 stop air-flow F to continue to be attached on the tube wall 8b on the tube wall 8 thereby promoting air-flow F to be attached to.Under condition shown in Figure 5,, be attached on the tube wall 8b thereby make air communication cross Coanda effect because element 18 is not upset air-flow F.

Shown in Fig. 4-6, also have a movable part 19, it comprises and is similar to the first above-mentioned moving element 16 and second moving element 18, and is positioned in the position corresponding to the inlet 8c of two terminal tract 9,10.The operator scheme of the second above-mentioned movable part is fully similar in appearance to operator scheme as described above.Under condition shown in Figure 5, second movable part is because Coanda effect is attached on the first crooked tube wall 9a of terminal tract 9 air-flow, thereby air-flow enters described pipeline 9.Simultaneously, under condition shown in Figure 6, this movable part makes that air-flow is attached to terminal tract 10 is on the crooked tube wall 10a equally, thereby makes air-flow enter pipeline 10.In addition, in this case, moving element 18 can also work, that disturbs main air-flow F may enter that part of of 8c inlet, make this part air-flow produce shuttling movement C (Fig. 4) there, the passage of " thereby obstruction " inlet 8c makes the air quantity that does not need to leak in the

pipeline

9,10 be reduced to minimum.

For identical purpose, according to the present invention, settling air recirculation passageway 20 corresponding to the position of terminal tract 8 and terminal tract 9 inlets, respectively under Fig. 5 and situation shown in Figure 6, its shape makes any possible unwanted gas leakage all will produce air circulation C, thereby stops air-flow to enter the pipeline of sensing.

Movable part 19 can be by the actuator control of any kind of, for example electromagnetic actuators (such as the actuator among Fig. 8 40), perhaps piezoelectric actuator, perhaps shape memory actuator.

Figure 8 shows that a version of parts 19, wherein U-shaped partly forms moving element 18, and this part also comprises having makes air motion become the blade 21 of straight function.

Certainly, do not twisting principle of the present invention, do not departing under the prerequisite of scope of the present invention, by example this displaying done and the details between description, model and the object lesson may alter a great deal.

Claims

1. air distributor based on Coanda effect comprises: a upstream line (7), and it branches out a plurality of downstream line (8,9,10); And utilize Coanda effect, make air-flow (F) deflection of passing upstream line (7) enter above-mentioned a plurality of downstream line (8,9,10) one of device, described device comprises first moving element (16), it is arranged on described a plurality of downstream line (8,9, on near the tube wall (7a) of the upstream line (7) first downstream line (8) inlet 10), and can between a primary importance and a second place, move, described first moving element does not disturb described air-flow (F) in the time of wherein on primary importance, and described first moving element stretches in the air-flow on the second place time, thereby when above-mentioned first moving element (16) when being in the first position, air-flow enters first downstream line (8) also owing to Coanda effect, and on first tube wall (8a) attached to described first downstream line (8); When this moving element (16) when being in the second place, air-flow enter in described a plurality of downstream line (8,9,10) second downstream line (9) and owing to Coanda effect tends to attached on the tube wall (8b) relative with described first tube wall (8a),

Described distributor is characterised in that, in the zone of the starting point that separates described first downstream line (8) and described second downstream line (9), be provided with the inlet of recirculation line (20), this recirculation line enters one of them (8) of described first downstream line (8) and described second downstream line (9), and the shape of this recirculation line makes when air-flow (F) is deflected into described second downstream line (9), can produce the air circulation of the inlet that covers this first downstream line (8) in described first downstream line (8).

2. the air distributor based on Coanda effect as claimed in claim 1, it is characterized in that, the above-mentioned device that carries out deflection by Coanda effect comprises: second moving element (18), and it is arranged on the tube wall (8b) relative with the tube wall at first moving element (16) place; And described second moving element (18) also can move between the primary importance and the second place, wherein at the above second moving element of primary importance disturbing flow (F) not, stretches in the described air-flow at the above second moving element of the second place; And described first moving element (16) and described second moving element (18) are synchronized with each other to be moved, thereby when first moving element (16) is in its primary importance, second moving element (18) is in its second place, and when first moving element (16) was in its second place, second moving element (18) was in its primary importance.

3. air distributor as claimed in claim 2, it is characterized in that, being arranged so that when this second moving element is in its second place of described second moving element (18), it can make the air-flow that strikes on it produce shuttling movement, when air flow deflector was gone into described first downstream line (8), this shuttling movement covered air-flow (F) and leads to described second downstream line (9) in described a plurality of downstream line (8,9,10) and the inlet of the 3rd downstream line (10).